Charles, since you have Dr. Toole's new book you'll probably get more good info from that, especially Chapter 13, "Delivering Good Bass in Small Rooms" from about pp.222-236, than we can offer. Yes, as he points out, the positioning of two or more subs at opposite mid-wall locations is most effective in rectangular rooms without large openings to other connecting areas. In other situations he emphasizes that taking measurements and then following with corrective electronic room equalization will give better total results than simply following basic placement suggestions automatically as a complete solution. So, those who have either separate room equalization equipment or built-in processing such as Audyssey MultEQ which equalizes subs should also experiment with that, using various sub locations.
